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timmy2 timmy2 is offline
ROW '78 911 Targa
 
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Join Date: Jul 2011
Location: Salem, OR
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Draw out the relay schematic.
You don’t need an 87a for headlight relays.

The double output on 87 (2 poles/contacts with the same normally open function) just means you run both to feed the top fuses for high or low beams. For low beams top of fuses 5&6
For high beams it is 7&8
Counting from the right side starting at the headlight.

Fred’s panels didn’t have internal jumpers, so dual output eliminates the need for jumpers.

Wire from 86 goes to the original top fuse wire for high or low beams (white or yellow)
Wire from 85 goes to a good ground.
Wire from 30 goes to a fused power input. (Battery or constant hot on fuse panel)

Repeat for second relay for high or low, depending on which you did first.
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Euro 1978 SC Targa, SSI's, Dansk 2/1, PMO ITBs, Electric A/C
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Old 09-11-2021, 11:50 PM
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